Underground coal mine supporting anchor rod

Abstract

The utility model belongs to the technical field of anchor rods, and discloses a coal mine underground supporting anchor rod which comprises a reinforcing mechanism and a supporting mechanism, the reinforcing mechanism comprises an anchor rod body, an expansion part is arranged above the anchor rod body and formed by surrounding four sets of expansion pieces of arc-shaped structures at intervals, a plurality of sets of anti-slip strips are installed on the outer walls of the expansion pieces, and a storage cavity is formed in the anchor rod body; compared with the prior art, the anchor rod has the following beneficial effects that through the design of the reinforcing mechanism, after the anchor rod is implanted, a liquid expanding agent permeates into the occlusion hole and forms a stable occlusion structure after being cured, so that the axial tension is effectively resisted; at the opening of the rod hole, the inner screw is rotated to drive the supporting block to move along the inclined face to open the expansion piece, the anti-slip strip is tightly embedded into the hole wall, the front end of the anchor rod is prevented from loosening, the anchor rod is not prone to loosening through the synergistic effect of the meshing hole and the expansion piece, and the supporting stability and safety of a coal mine tunnel are enhanced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coal mine underground supporting anchor rod belongs to anchor rod technical field. BACKGROUND

[0002] In the coal mine underground mining operation, roadway support is the key link of guaranteeing safety production, anchor rod and metal net combined support as the commonly used supporting mode, through the anchor rod deeply into the rock mass inside provides anchoring force, connects the unstable rock block with the stable rock mass, and the metal net is laid on the roadway surface, and the rock block is restrained to prevent falling, and the two cooperate to form the overall support structure, and jointly maintain the roadway stability, create conditions for the underground personnel and equipment safe operation.

[0003] The current anchor rod support usually relies on the expansion of expansion agent, so that it is closely combined with the hole wall, so as to enhance the anchoring force, but in the construction process, the expansion agent is generally injected into the inside of the rod hole, and there is more in the rear of the inside of the rod hole, and the expansion agent is less in the hole opening, which leads to insufficient anchoring strength of the anchor rod and the hole wall at the opening, and it is difficult to effectively constrain the anchor rod, when the anchor rod front end is subjected to pressure or external force, the anchor rod front end is prone to loosen at the opening, leading to insufficient anchoring force, and the insufficient anchoring force at the opening will damage the synergy of the anchor rod and the metal net support system, the metal net needs to be stably fixed by the anchor rod, the opening end of the anchor rod is unstable, which will make the metal net lose reliable support, cannot evenly disperse the pressure, causes the local area to be stressed too much, and the metal net is prone to tearing and deformation, and then the protection ability of the whole support structure to the roadway surface is weakened.

[0004] In view of this, the coal mine underground supporting anchor rod is provided to solve the above problems. INVENTION CONTENTS

[0005] The utility model discloses a kind of coal mine underground supporting anchor rods to solve the above problems, by design reinforcing mechanism, after anchor rod implantation, liquid expansion agent seeps into occlusion hole, forms stable occlusion structure after solidification, effectively resists axial tension;At the opening of rod hole, rotating inner screw drives support block to move along inclined plane and prop open expansion sheet, so that anti-skid strip is tightly embedded in hole wall, prevent anchor rod front end from loosening, through the synergy of occlusion hole and expansion sheet, anchor rod is not prone to loosening, enhance coal mine roadway support stability and security, solve the problems raised in the above background technique.

[0006] The utility model provides a kind of coal mine underground support anchor rod, comprising: reinforcement mechanism, including anchor rod main body, expansion part is equipped above the anchor rod main body, the expansion part is formed by four groups of arc structure expansion sheet spacing around, and the outer wall of expansion sheet is equipped with multiple anti-skid strips, storage cavity is set in the anchor rod main body, and the support block that can move straining expansion sheet is equipped in storage cavity, the outer side of anchor rod main body below is equipped with multiple groups of occlusion hole for the expansion agent into increase anchor rod main body occlusion force, the support plate is equipped above the anchor rod main body;Auxiliary support mechanism, including the outer ring that can rotate in the outer side of anchor rod main body, the outer side of the outer ring is connected with multiple groups of cross frame, the extension screw rod that can be telescopic is equipped in the cross frame, and extension plate is installed in the front end of extension screw rod, and the front end of extension plate is movably installed with the positioning drill for the fixed extension plate.

[0007] As a preferred embodiment, the anchor rod main body is equipped with spiral sheet below, and the anchor rod main body is equipped with conical part at lower end.

[0008] As a preferred embodiment, the anchor rod main body is equipped with screw thread on outer wall, and nut is connected with screw thread above the anchor rod main body.

[0009] As a preferred embodiment, the anchor rod main body is equipped with rod cavity in inner portion above, and screw ring is fixed in the rod cavity, inner screw rod is connected with screw thread in the screw ring, the lower end of inner screw rod is fixedly connected with support block, and hexagonal groove is formed in the upper portion of inner screw rod.

[0010] As a preferred embodiment, the support block is circular platform structure, the diameter length of storage cavity is greater than the diameter length of rod cavity, and the top of storage cavity has guiding surface inclined to rod cavity.

[0011] As a preferred embodiment, the outer ring is located above support plate, and rubber gasket is installed on the upper and lower surfaces of outer ring.

[0012] As a preferred embodiment, the end of cross frame away from outer ring is rotatably connected with rotating screw cylinder, and rotating screw cylinder is connected with extension screw rod with screw thread.

[0013] As a preferred embodiment, a group of guide grooves is formed in the two sides of cross frame respectively, and sliding block is slidably arranged in guide groove, and sliding block is fixedly connected with extension screw rod.

[0014] As a preferred embodiment, the end of positioning drill towards conical part is sharp part, and the other end is knocking part.

[0015] Beneficial effects:

[0016] 1. By designing the reinforcing mechanism, when the anchor rod is implanted into the rod hole, the liquid expansion agent penetrates into the occlusal hole, and the combination after the expansion agent solidifies forms a stable occlusal connection, effectively inhibiting the sliding phenomenon of the anchor rod under the axial tension, at the opening of the rod hole, the support block is moved into the rod cavity along the inclined guide surface by rotating the inner screw rod, with the movement of the support block, the expansion sheet is expanded, the anti-skid strip is tightly embedded with the hole wall, the front end of the anchor rod is not easy to loosen at the hole opening, the reinforcing mechanism is reinforced by the occlusal hole and the expansion sheet, realizing the stable support of the anchor rod, solving the loosening hidden danger caused by the lack of expansion agent at the opening of the existing anchor rod, and significantly improving the reliability and safety of the coal mine roadway support system.

[0017] 2. By designing the auxiliary support mechanism, the position of the three groups of horizontal frames can be adjusted by rotating the outer ring, and then the extension length of the extension screw rod can be adjusted according to the requirement by rotating the rotary cylinder, so that the metal net auxiliary support can be realized, the support area is expanded, the metal net in the suspended area away from the anchor rod position can also be effectively supported and is not easy to sag, and after the adjustment is completed, the positioning rod is inserted into the rock wall to realize the positioning of the extension screw rod, so that the extension screw rod is not easy to move and the support position is locked. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the coal mine underground support anchor rod.

[0019] Figure 2 It is a structure schematic view of the coal mine underground support anchor rod from the perspective of the coal mine underground support anchor rod.

[0020] Figure 3 It is a structure schematic view of the coal mine underground support anchor rod from the perspective of the coal mine underground support anchor rod.

[0021] Figure 4 It is a structure schematic view of the coal mine underground support anchor rod from the perspective of the coal mine underground support anchor rod. Figure 1 It is an enlarged structure schematic view of A part of the coal mine underground support anchor rod.

[0022] Figure 5 It is an enlarged structure schematic view of B part of the coal mine underground support anchor rod. Figure 1

[0023] In the figure, 1, reinforcing mechanism; 11, anchor rod main body; 12, conical part; 13, spiral sheet; 14, expansion part; 141, expansion sheet; 142, anti-skid strip; 15, support plate; 16, nut; 17, storage cavity; 18, support block; 19, inner screw rod; 110, screw ring; 111, rod cavity; 112, hexagonal groove; 113, occlusal hole; 2, auxiliary support mechanism; 21, outer ring; 22, horizontal frame; 23, extension plate; 24, positioning rod; 25, extension screw rod; 26, guide groove; 27, sliding block; 28, rotary cylinder; 29, rubber gasket. DETAILED DESCRIPTION

[0024] ​The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present utility model.

[0025] Please refer to Figures 1-5 As shown in the figure, a coal mine underground supporting anchor rod, including: reinforcement mechanism 1, including anchor rod main body 11, anchor rod main body 11 top is equipped with expansion part 14, expansion part 14 is formed by four groups of arc structure expansion sheet 141 interval around, and expansion sheet 141 outer wall is equipped with multiple anti-skid strip 142, anchor rod main body 11 inside is equipped with storage cavity 17, and storage cavity 17 is equipped with movable support block 18 that can open expansion sheet 141, anchor rod main body 11 lower outside is equipped with multiple groups of occlusion hole 113 for entering expansion agent to increase the occlusion force of anchor rod main body 11, anchor rod main body 11 top is equipped with supporting plate 15;Auxiliary support mechanism 2, including the outer ring 21 that can rotate outside anchor rod main body 11, the outer ring 21 outside is connected with multiple groups of cross frame 22, cross frame 22 is equipped with telescopic extension screw 25 that can support metal net, and extension screw 25 front end is equipped with extension plate 23, extension plate 23 front end is equipped with positioning drill 24 for fixing extension plate 23.

[0026] Please refer to Figures 1-2 As shown in the figure, anchor rod main body 11 lower end is equipped with conical part 12, conical part 12 and spiral blade 13 facilitate anchor rod main body 11 to be rotated into hole position.

[0027] Please refer to Figures 1-3 As shown in the figure, anchor rod main body 11 outer wall is equipped with screw thread, and anchor rod main body 11 top is equipped with nut 16 by screw thread.

[0028] Please refer to Figure 3 As shown in the figure, anchor rod main body 11 inside top is equipped with rod cavity 111, and anchor rod main body 11 inside top is equipped with screw ring 110, screw ring 110 is equipped with inner screw rod 19 by screw thread, inner screw rod 19 lower end is fixedly connected with support block 18, inner screw rod 19 top is equipped with hexagonal groove 112, by using inner hexagonal wrench, it can be convenient to extend into hexagonal groove 112 and rotate inner screw rod 19.

[0029] Please refer to Figure 3 As shown in the figure, support block 18 is circular truncated cone structure, and the diameter length of storage cavity 17 is greater than the diameter length of rod cavity 111, and the top of storage cavity 17 has inclined guide surface towards rod cavity 111.

[0030] Please refer to Figure 1 And Figure 5As shown, the outer ring 21 is located above the supporting plate 15, and rubber pads 29 are installed on the upper and lower surfaces of the outer ring 21, which can increase the friction when the outer ring 21 is contacted, and the outer ring 21 is not easy to slide when the nut 16 and the supporting plate 15 are tightly attached to the outer ring 21.

[0031] As shown in Figure 1 , Figure 2 and Figure 5 , the end of the horizontal frame 22 away from the outer ring 21 is rotatably connected with a rotating screw cylinder 28, and the rotating screw cylinder 28 is threadedly connected with the extension screw rod 25.

[0032] As shown in Figure 1 and Figure 5 , a group of guide grooves 26 are formed on the two sides of the horizontal frame 22, and a sliding block 27 is slidably arranged in the guide groove 26, and the sliding block 27 is fixedly connected with the extension screw rod 25.

[0033] As shown in Figures 1-2 , the end of the positioning drill 24 towards the conical part 12 is a sharp part, and the other end is a knocking part, and the sharp part of the positioning drill 24 can be knocked into the rock wall through the knocking part.

[0034] In specific use, the working principle of the utility model is as follows:

[0035] After the hole site is drilled, the liquid expansion agent is filled into the hole site, and then the anchor rod body 11 is rotated, and the conical part 12 of the anchor rod body 11 is convenient for being screwed into the hole site; after the anchor rod is implanted, the liquid expansion agent seeps from the occlusion hole 113, and when the expansion agent is solidified, the occlusion structure is formed with the rock mass to enhance the occlusion force; after the anchor rod body 11 is inserted, the inner hexagonal wrench is inserted into the hexagonal groove 112 to rotate the inner screw rod 19, and the screw ring 110 and the inner screw rod 19 are threadedly matched, so that the inner screw rod 19 drives the circular table-shaped support block 18 to move towards the rod cavity 111, and due to the inclined guide surface at the top of the storage cavity 17 and the change of the diameter, the support block 18 is expanded to make the anti-skid strip 142 tightly embedded with the hole wall, and the expansion of the expansion piece 141 prevents the front end of the anchor rod body 11 from loosening at the opening;

[0036] Subsequently, the supporting plate 15 is placed on the surface of the metal net and the anchor rod passes through the supporting plate 15, the next step is to put the outer ring 21 on the front end of the anchor rod, and rotate the outer ring 21 to drive the multiple groups of cross frames 22 to move, adjust the positions of the three groups of cross frames 22 to adapt to the supporting position of the metal net, adapt to the supporting demand, after the adjustment is completed, then rotate the rotating cylinder 28, through the threaded transmission with the extension screw 25, the extension screw 25 drives the sliding block 27 to move along the path of the guide groove 26, so that the extension screw 25 adjusts the supporting length, after the adjustment is completed, through the screw nut 16 and the front end of the anchor rod body 11 is screwed and connected, so that the metal net is close to the rock wall, so that the supporting plate 15 and the outer ring 21 are clamped and fixed, after the adjustment is completed, the next step is to use the positioning drill 24 to knock and insert along the wall, so that the extension plate 23 is positioned, thereby assisting the support of the metal net suspended around the anchor rod body 11, and expanding the supporting area.

[0037] It is apparent for those skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but can be implemented in other concrete forms without departing from the spirit or essential characteristics of the present application. Therefore, the embodiments should be considered in all aspects as illustrative and not restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended to encompass all changes falling within the meaning and range of equivalents of the claims. Any reference signs in the claims should not be considered as limiting the claims to which they belong.

[0038] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A coal mine underground support anchor rod, characterised in that, Include: Reinforcing mechanism (1), including anchor rod body (11), the anchor rod body (11) is provided with expansion part (14) upwards, the expansion part (14) is formed by four groups of arc-shaped expansion sheet (141) interval around, and the outer wall of expansion sheet (141) is provided with a plurality of anti-skid strips (142), the anchor rod body (11) is provided with storage cavity (17) inside, and the storage cavity (17) is provided with movable support block (18) that can move and expand sheet (141), the anchor rod body (11) is provided with a plurality of occlusion holes (113) for expansion agent into increasing the occlusion force of anchor rod body (11) outside lower side, the anchor rod body (11) is provided with support plate (15) upwards; Auxiliary support mechanism (2), including the outer ring (21) that can rotate outside anchor rod body (11), the outer ring (21) is connected with a plurality of cross frames (22) outside, the cross frame (22) is provided with telescopic extension screw (25) that can support metal net, and the extension screw (25) is provided with extension plate (23) at front end, the extension plate (23) is movably installed with the positioning drill (24) for fixing extension plate (23) at front end.

2. A coal mine underground support roof-bolt as claimed in claim 1 wherein: The anchor rod body (11) is provided with spiral blade (13) below, and the anchor rod body (11) is provided with conical part (12) at lower end.

3. A coal mine underground support roof-bolt as claimed in claim 2 wherein: The outer wall of the anchor rod body (11) is provided with a thread, and the anchor rod body (11) is provided with a nut (16) above the thread.

4. A coal mine underground support roof-bolt as claimed in claim 3 wherein: The anchor rod body (11) is provided with a rod cavity (111) inside the upper part, and a spiral (110) is fixed in the rod cavity (111), the spiral (110) is provided with an internal screw rod (19) in the thread, the internal screw rod (19) is fixedly connected with the support block (18) at the lower end, and the internal screw rod (19) is provided with a hexagonal groove (112) above.

5. A coal mine underground support roof-bolt as claimed in claim 4 wherein: The support block (18) is a circular table structure, and the diameter length of the storage cavity (17) is greater than the diameter length of the rod cavity (111), and the top of the storage cavity (17) has a guide surface inclined towards the rod cavity (111).

6. A coal mine underground support roof-bolt as claimed in claim 1 wherein: The outer ring (21) is located above the support plate (15), and the outer ring (21) is provided with rubber pads (29) on the upper and lower surfaces.

7. A coal mine underground support roof-bolt as claimed in claim 6 wherein: The end of the cross frame (22) away from the outer ring (21) is rotatably connected with a rotating screw cylinder (28), and the rotating screw cylinder (28) is threadedly connected with the extension screw (25).

8. A coal mine underground support roof-bolt as claimed in claim 7 wherein: A set of guide grooves (26) are formed on both sides of the cross frame (22), and a sliding block (27) is slidably arranged in the guide groove (26), and the sliding block (27) is fixedly connected with the extension screw (25).

9. A coal mine underground support roof-bolt as claimed in claim 8 wherein: The end of the positioning drill (24) towards the conical part (12) is a sharp part, and the other end is a knocking part.

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